audk/Vlv2TbltDevicePkg/FvbRuntimeDxe/FvbServiceDxe.c

/** @file
  Firmware Volume Block Driver for Lakeport Platform.

  Firmware volume block driver for FWH or SPI device.
  It depends on which Flash Device Library to be linked with this driver.

Copyright (c) 2006  - 2014, Intel Corporation. All rights reserved.<BR>
                                                                                   
  This program and the accompanying materials are licensed and made available under
  the terms and conditions of the BSD License that accompanies this distribution.  
  The full text of the license may be found at                                     
  http://opensource.org/licenses/bsd-license.php.                                  
                                                                                   
  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,            
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.    
                                                                                   

**/

#include <PiDxe.h>
#include <Library/UefiRuntimeLib.h>
#include "FvbService.h"

extern FWB_GLOBAL              mFvbModuleGlobal;

/**
  Call back function on EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE event.

  Fixup internal data so that the driver is callable in EFI runtime
  in virtual mode. Convert the mFvbModuleGlobal date items to there
  virtual address.

  @param  Event     Event whose notification function is being invoked.
  @param  Context   The context of the Notification context. Not used in
                    this call back function.

**/
VOID
EFIAPI
FvbVirtualddressChangeEvent (
  IN EFI_EVENT                          Event,
  IN VOID                               *Context
  )
{
  EFI_FW_VOL_INSTANCE                   *FwhInstance;
  UINTN                                 Index;

  //
  // Convert the base address of all the instances.
  //
  for (Index = 0; Index < mFvbModuleGlobal.NumFv; Index++) {
    FwhInstance = GetFvbInstance (Index);
    EfiConvertPointer (0, (VOID **) &FwhInstance->FvBase);
  }

  EfiConvertPointer (0, (VOID **) &mFvbModuleGlobal.FvInstance);
}


/**
  The function installs EFI_FIRMWARE_VOLUME_BLOCK protocol
  for each FV in the system.

  @param[in]  FwhInstance   The pointer to a FW volume instance structure,
                            which contains the information about one FV.
  @param[in]  InstanceNum   The instance number which can be used as a ID
                            to locate this FwhInstance in other functions.

  @retval     VOID

**/
VOID
InstallFvbProtocol (
  IN  EFI_FW_VOL_INSTANCE               *FwhInstance,
  IN  UINTN                             InstanceNum
  )
{
  EFI_FW_VOL_BLOCK_DEVICE               *FvbDevice;
  EFI_FIRMWARE_VOLUME_HEADER            *FwVolHeader;
  EFI_STATUS                            Status;
  EFI_HANDLE                            FwbHandle;
  EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL    *OldFwbInterface;

  FvbDevice = (EFI_FW_VOL_BLOCK_DEVICE *) AllocateRuntimeCopyPool (
                                            sizeof (EFI_FW_VOL_BLOCK_DEVICE),
                                            &mFvbDeviceTemplate
                                            );
  ASSERT (FvbDevice != NULL);

  FvbDevice->Instance = InstanceNum;
  FwVolHeader = &FwhInstance->VolumeHeader;

  //
  // Set up the devicepath.
  //
  DEBUG ((EFI_D_INFO, "FwBlockService.c: Setting up DevicePath for 0x%lx:\n", FwhInstance->FvBase));
  if (FwVolHeader->ExtHeaderOffset == 0) {
    //
    // FV does not contains extension header, then produce MEMMAP_DEVICE_PATH.
    //
    FvbDevice->DevicePath = (EFI_DEVICE_PATH_PROTOCOL *) AllocateRuntimeCopyPool (sizeof (FV_MEMMAP_DEVICE_PATH), &mFvMemmapDevicePathTemplate);
    ((FV_MEMMAP_DEVICE_PATH *) FvbDevice->DevicePath)->MemMapDevPath.StartingAddress = FwhInstance->FvBase;
    ((FV_MEMMAP_DEVICE_PATH *) FvbDevice->DevicePath)->MemMapDevPath.EndingAddress   = FwhInstance->FvBase + FwVolHeader->FvLength - 1;
  } else {
    FvbDevice->DevicePath = (EFI_DEVICE_PATH_PROTOCOL *) AllocateRuntimeCopyPool (sizeof (FV_PIWG_DEVICE_PATH), &mFvPIWGDevicePathTemplate);
    CopyGuid (
      &((FV_PIWG_DEVICE_PATH *)FvbDevice->DevicePath)->FvDevPath.FvName,
      (GUID *)(UINTN)(FwhInstance->FvBase + FwVolHeader->ExtHeaderOffset)
      );
  }

  //
  // Find a handle with a matching device path that has supports FW Block protocol.
  //
  Status = gBS->LocateDevicePath (
                  &gEfiFirmwareVolumeBlockProtocolGuid,
                  &FvbDevice->DevicePath,
                  &FwbHandle
                  );
  if (EFI_ERROR (Status) ) {
    //
    // LocateDevicePath fails so install a new interface and device path.
    //
    DEBUG ((EFI_D_INFO, "FwBlockService.c: LocateDevicePath failed, install new interface 0x%lx:\n", FwhInstance->FvBase));
    FwbHandle = NULL;
    Status =  gBS->InstallMultipleProtocolInterfaces (
                     &FwbHandle,
                     &gEfiFirmwareVolumeBlockProtocolGuid,
                     &FvbDevice->FwVolBlockInstance,
                     &gEfiDevicePathProtocolGuid,
                     FvbDevice->DevicePath,
                     NULL
                     );
    ASSERT_EFI_ERROR (Status);
    DEBUG ((EFI_D_INFO, "FwBlockService.c: IMPI FirmwareVolBlockProt, DevPath 0x%lx: %r\n", FwhInstance->FvBase, Status));

  } else if (IsDevicePathEnd (FvbDevice->DevicePath)) {
    //
    // Device allready exists, so reinstall the FVB protocol.
    //
    DEBUG ((EFI_D_ERROR, "FwBlockService.c: LocateDevicePath succeeded, reinstall interface 0x%lx:\n", FwhInstance->FvBase));
    Status = gBS->HandleProtocol (
                    FwbHandle,
                    &gEfiFirmwareVolumeBlockProtocolGuid,
                    (VOID **) &OldFwbInterface
                    );
    ASSERT_EFI_ERROR (Status);

    Status =  gBS->ReinstallProtocolInterface (
                     FwbHandle,
                     &gEfiFirmwareVolumeBlockProtocolGuid,
                     OldFwbInterface,
                     &FvbDevice->FwVolBlockInstance
                     );
    ASSERT_EFI_ERROR (Status);

  } else {
    //
    // There was a FVB protocol on an End Device Path node.
    //
    ASSERT (FALSE);
  }

}


/**
  The driver entry point for Firmware Volume Block Driver.

  The function does the necessary initialization work for
  Firmware Volume Block Driver.

  @param[in]  ImageHandle       The firmware allocated handle for the UEFI image.
  @param[in]  SystemTable       A pointer to the EFI system table.

  @retval     EFI_SUCCESS       This funtion always return EFI_SUCCESS.
                                It will ASSERT on errors.

**/
EFI_STATUS
EFIAPI
DxeFvbInitialize (
  IN EFI_HANDLE                         ImageHandle,
  IN EFI_SYSTEM_TABLE                   *SystemTable
  )
{
  EFI_STATUS                            Status;
  EFI_EVENT                             Event;

  Status = gBS->CreateEventEx (
                  EVT_NOTIFY_SIGNAL,
                  TPL_NOTIFY,
                  FvbVirtualddressChangeEvent,
                  NULL,
                  &gEfiEventVirtualAddressChangeGuid,
                  &Event
                  );
  ASSERT_EFI_ERROR (Status);

  FvbInitialize ();

  return EFI_SUCCESS;
}